Yellowstone River
The Yellowstone is the longest undammed river in the lower 48 states, flowing 692 miles from Yellowstone National Park through Paradise Valley and across the Montana plains. It is home to the native Yellowstone cutthroat trout and offers some of the most scenic fly fishing in the American West.
Current Conditions
Typical Monthly Flows
Historical median discharge (CFS) by month — Yellowstone River
Overview
The Yellowstone River is a Montana icon — wild, undammed, and spectacularly productive. From its emergence from Yellowstone Lake through the dramatic Paradise Valley between the Absaroka and Gallatin ranges, this river offers a fishing experience unlike any other.
In the park, the Yellowstone supports native cutthroat trout that rise eagerly to dry flies in the meadow stretches between Yellowstone Lake and the Grand Canyon. Outside the park, the river enters Paradise Valley, where it becomes a powerful freestone river holding abundant rainbow and brown trout alongside native cutthroats.
The stretch from Gardiner to Livingston is premier float fishing water. Experienced guides row drift boats through boulder gardens and long riffles, presenting dry flies and nymphs to willing trout. The salmonfly hatch in early July turns this section into a feeding frenzy.
Below Livingston, the Yellowstone widens and warms, but still produces excellent fishing, particularly for large brown trout in fall. The river eventually reaches the Great Plains, where it supports walleye, sauger, and channel catfish — a completely different but equally rewarding fishery.
Species Present

Rainbow Trout
The rainbow trout is Montana's most widespread gamefish, prized for its aerial acrobatics and willingness to take dry flies. Native to Pacific drainages, rainbows have been stocked extensively and now thrive in most Montana rivers. They are typically identified by their pink lateral stripe, spotted tail, and silvery body.

Brown Trout
Brown trout are the wariest and most challenging trout species in Montana waters. Originally from Europe, browns have established self-sustaining populations throughout the state. They are recognized by their golden-brown coloration with dark spots surrounded by light halos. Browns grow larger than most other trout species and are famous for aggressive streamer takes.

Yellowstone Cutthroat Trout
The Yellowstone cutthroat is Montana's native trout and a species of special conservation concern. Distinguished by the distinctive red-orange slash marks under the jaw, cutthroats are generally more willing to eat dry flies than other trout species but are more sensitive to habitat degradation and competition from non-native species.

Mountain Whitefish
Mountain whitefish are native to most Montana river systems and are often overlooked by anglers focused on trout. These fish readily take nymphs and small dry flies and can provide excellent sport, particularly in winter when trout fishing slows. Whitefish are easily identified by their small, downturned mouths and silvery, elongated bodies.
Hatch Chart
| Insect | Suggested Fly | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Blue-Winged Olive (Baetis) afternoon | Parachute Adams | ||||||||||||
Salmonfly (Pteronarcys) all day | Norm Wood Special | ||||||||||||
Golden Stonefly all day | Stimulator | ||||||||||||
Pale Morning Dun morning | PMD Comparadun | ||||||||||||
Caddisflies (various) evening | Elk Hair Caddis | ||||||||||||
Green Drake afternoon | Parachute Adams | ||||||||||||
Blue-Winged Olive (Baetis) afternoon | BWO Emerger | ||||||||||||
Terrestrials (hoppers, beetles) afternoon | Chubby Chernobyl |
Blue-Winged Olive (Baetis): Good spring BWO hatches throughout Paradise Valley.
Salmonfly (Pteronarcys): Early July. Later than the Madison due to elevation/snowmelt.
Golden Stonefly: Overlaps with and follows the salmonfly hatch.
Pale Morning Dun: Mid-summer PMD hatches. Size 14-16.
Caddisflies (various): Consistent evening caddis hatches.
Green Drake: Sporadic but exciting. Size 10-12. Use a large Parachute Adams.
Blue-Winged Olive (Baetis): Fall BWOs on overcast days.
Terrestrials (hoppers, beetles): Hopper fishing along grassy banks is prime.
Recommended Flies
Parachute Adams
Top PickWorks everywhere on the Yellowstone
Best in summer
Stimulator
Top PickEssential during stonefly season
Best in summer
Chubby Chernobyl
Top PickFloat fishing staple
Best in summer
Norm Wood Special
Top PickSalmonfly hatch in early July
Best in summer
Pheasant Tail Nymph
Top PickReliable all season
Best in spring
Pat's Rubber Legs
Top PickBig stonefly nymph for deep runs
Best in spring
Woolly Bugger
Top PickStreamer fishing for fall browns
Best in fall
Sex Dungeon
Top PickBig water streamer for trophy fish
Best in fall
Also Effective
Access Points & Boat Launches
Gardiner Town Launch
Boat LaunchLaunch point at the park boundary. Start of the Paradise Valley float.
Corwin Springs Bridge
Wade AccessWade access near the USGS gauge. Good pocket water and runs.
Mallard's Rest FAS
Boat LaunchPopular put-in for Paradise Valley floats. Developed ramp and camping.
Livingston City Launch
Boat LaunchIn-town access point with improved facilities.
Grey Owl FAS
Boat LaunchMid-valley access point. Good for short float sections.
Regulations
Regulations
Season: Third Saturday in May through November 30 (extended catch-and-release Dec 1 — third Sat in May on some sections). Yellowstone National Park: catch-and-release only, no lead tackle, park fishing permit required (no state license needed inside park). Gardiner to Livingston: artificial flies/lures only in upper sections, 5 trout daily combined, only 1 brown over 18". Yellowstone cutthroat: catch-and-release only throughout upper river. Hoot-owl restrictions (2 PM closure) common July–August when water temps exceed 73°F. Check FWP at fwp.mt.gov for emergency closures and section-specific rules.
Always verify current regulations with Montana Fish, Wildlife & Parks before fishing.
Quick Facts
- Region
- South Central Montana
- Best Seasons
- summer, fall
- Species
- Rainbow Trout, Brown Trout, Yellowstone Cutthroat Trout, Mountain Whitefish
- USGS Gauge
- 06191500
Local Shops & Guides
Yellowstone Angler
Livingston, MT
Livingston's finest fly shop serving the Yellowstone, spring creeks, and surrounding waters. Detailed fishing reports updated daily throughout the season.
(406) 222-7130
Paradise Valley Lodge
Livingston, MT
A comfortable fishing lodge in Paradise Valley with easy access to the Yellowstone River, spring creeks, and Yellowstone National Park. Guided float trips and walk-wade adventures.
(406) 333-4000
Murray's Fly Shop
Livingston, MT
Livingston institution since 1981. Murray's carries a curated selection of flies, gear, and books for Yellowstone-area fishing. Known for friendly, no-nonsense advice.
(406) 222-1673
Montana Troutfitters
Bozeman, MT
Premier guide service based in Bozeman offering float and wade trips on the Gallatin, Madison, Yellowstone, and Missouri rivers. Experienced guides, top-quality equipment.
(406) 587-4707